radical‐mediated C−H alkynylation reaction of inactivated alkanes was described. The reaction features mild operation condition and wide substrate scope, and affords the corresponding products in moderate to good yields. Notably, The presence of 4‐cyanopyride N‐oxide was key to the success of the reaction. Cyclohexane are more easily to be functionalized in this reaction than toluene, which could be rationally
Visible light promoted coupling of alkynyl bromides and Hantzsch esters for the synthesis of internal alkynes
作者:Zhi-Yong Song、Chun-Lin Zhang、Song Ye
DOI:10.1039/c8ob02912a
日期:——
A metal-free visible light promoted C(sp3)–C(sp) coupling reaction of alkynyl bromides and Hantzsch esters was developed, giving internal alkynes with primary, secondary, tertiary alkyl or other functional groups in good to high yields.
Highly
<i>E</i>
‐Selective Olefin Synthesis Catalysed by Novel Quinoxalinone Photocatalyst under Visible Light Conditions
作者:Xin Xu、Jie Huang、Dandan Gao、Jiahua Wang、Xiang‐Ying Tang、Long Wang
DOI:10.1002/chem.202300360
日期:——
An efficient method for the synthesis of highly E-selective olefins directly utilizing alkyl boronic acids as radical precursors was developed, catalysed by novel quinoxalinone-type catalyst.